KR100641398B1 - Apparatus for an oil alien substance removal and collection in hydraulic machine - Google Patents

Abstract

An apparatus for removing and collecting foreign substances in a working oil of a hydraulic unit is provided to effectively analyze the oil and systematically manage hydraulic equipment by connecting the foreign substances according to the sizes of the filters. An apparatus for removing and collecting foreign substances in a working oil of a hydraulic unit includes a discharge line(110), a return line(120), and a branch line(150). The working oil is supplied from a tank to a pump through the discharge line. The working oil in the discharge line returns to the tank via various actuators through the return line. The branch line is branched from the return line. If a direction switching valve is switched, the working oil passes through the apparatus and converges to the return line.

Description

Apparatus for an oil alien substance removal and collection in hydraulic machine

1 is a block diagram of a foreign material removal circuit of the hydraulic equipment operating oil according to the prior art.

Figure 2 is a block diagram of the foreign material removal and collection circuit of the hydraulic machine hydraulic fluid according to the present invention.

Figure 3 is a perspective view schematically showing the configuration of the foreign matter removal and collection device of the hydraulic machine hydraulic fluid according to the present invention.

4 is a cross-sectional view schematically showing the configuration of FIG.

** Description of Codes for Major Configurations of Drawings **

110: discharge line 120: return line

122: first check valve 130: first return line

132: second check valve 134: oil cooler

140: second return line 142: directional control valve

150: branch line 152: bypass check valve

160: parallel line 170: strainer

180: return filter 200: foreign material removal and collection device

210,212,214: filter 220,222,224,226: chamber

230: inlet 236: outlet

240,242,244,246: Chip Detector

The present invention relates to a foreign material removal and collection device of the hydraulic oil of the hydraulic device, and more particularly, to form a chamber partitioned with a plurality of filters to remove the foreign matter by size or by component in sequence and the particle size of the foreign matter according to the size of the filter The present invention relates to a foreign material removal and collection device of hydraulic oil that performs effective oil analysis and systematic hydraulic equipment management by collecting differently.

Typically, the hydraulic equipment is a device for driving various hydraulic actuators (hydraulic cylinder, hydraulic motor, etc.) by converting the torque of the engine from the hydraulic pump to the pressure energy of the working oil.

The hydraulic cylinder is an actuator for linearly reciprocating another member connected to the rod by extending the rod by a power means such as a pressurized pressure supplied from the hydraulic pump according to the configuration of the hydraulic circuit. Such hydraulic cylinders are widely used in steering and suspension systems of industrial machinery or vehicles such as presses and lathes. In addition, the hydraulic motor is an actuator that rotates and converts the pressure energy of the hydraulic oil into the rotating torque. Heavy construction equipment such as excavators and loaders is equipped with hydraulic cylinders in the attachments, and is a representative hydraulic system equipped with a traveling motor for moving the heavy equipment and a turning motor for rotating the upper and lower parts.

As described above, hydraulic components are operated according to the supply and return of the operating oil by using the hydraulic circuit configured as desired. As the conditions of the working oil, products satisfying the functions of gamma, cooling, sealing, buffering, rust prevention and cleanness are used. . Here, when the oil that satisfies the above conditions changes due to various factors, the lubrication effect of the oil decreases and the resistance of the entire hydraulic circuit increases, thereby increasing internal friction and correspondingly perturbation parts of the hydraulic circuit. The vicious cycle of promoting wear and tear continues. In this way, when the perturbation part (hydraulic pump, hydraulic motor, hydraulic cylinder, hydraulic valve, etc.) is worn by internal friction and metallic foreign matter is generated in the hydraulic oil, the metallic foreign matter penetrates the hydraulic perturbation again and acts as an abrasive. This creates harmful scratches and triggers abrasive wear. This primary wear damage eventually leads to secondary damage such as deterioration and breakage of hydraulic components.

In addition, these metallic wear particles easily oxidize the hydraulic oil, which causes a large amount of sludge in the hydraulic oil, which deteriorates and contaminates the hydraulic oil by continuous use, and shortens the life of the hydraulic oil.

As such, the heavy equipment hydraulic tank uses the strainer 10 and the return filter 20 to filter the hydraulic fluid as shown in FIG.

The strainer 10 is to filter the foreign material of the hydraulic oil sucked into the pump (P) in the hydraulic tank (T), the return filter 20 is to filter the foreign material of the operating flow rate returned after the operation of the equipment.

That is, the strainer 10 mainly filters foreign matters that have not been processed by the return filter 20 among those foreign matters and those bypassed in the hydraulic tank T. The return filter 20 mainly filters foreign substances generated from main components of equipment such as pumps, motors, control valves, and piping parts such as pipes, fittings, and hoses.

However, there are various kinds of foreign materials ranging from fine to huge ones, and the components are also composed of metal components and non-metallic components, and even foreign metals having various properties such as non-ferrous metals and ferrous metals are also present. The non-metallic component is mostly due to the oxidation and deterioration reaction of the additive and the working oil, and the metal component is often due to wear in the sliding part of the hydraulic system.

Of course, initially there may be due to various machining chips, foundry sand or contaminants of pipes, hoses, tanks, castings in the hydraulic system, but these parts can be sufficiently removed through management of the cleanliness of the initial parts, As described above, the foreign matters are removed by the strainer 10 and the return filter 20. When the density of the return filter 20 is used in detail, the foreign matters are slow to be filtered, and the back pressure increases. A larger pressure source is required for the equipment, which results in greater losses. In addition, the temperature of the hydraulic oil rises. Filters should also be used to withstand higher pressures.

In addition, if the particle size of the strainer 10 is reduced, foreign matter may be filtered, but the filtration speed may be slow and the strainer 10 may be clogged, which may cause damage due to cavitation of the pump.

In order to solve this problem, research is being conducted for the optimal combination of the specification of the working oil and the return filter 20 and the strainer 10. However, despite many research investments, there are no results.

Recently, oil analysis is usually performed through oil sampling to diagnose the condition of hydraulic equipment. To this end, the operation of the equipment is stopped, the oil is extracted from the oil port or the oil tank, put into a sampling bottle, moved to the laboratory, and the overall oil analysis is performed. Will try. In general, various analysis equipments such as particle count analysis and spectrometer for component analysis using a particle counter for contaminants of working oil are used, which results in excessive analysis time and cost.

In order to collect the foreign material for analysis, the return filter 20 or the like should be decomposed to collect foreign matters. In most cases, oil sampling through oil sampling filters the filter paper and analyzes it, but the collected foreign matter is not classified by size. In addition, foreign matter of iron-based and non-ferrous metals are not classified here, which limits the analysis.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, the object of the present invention is to leave the specifications of the strainer and the return filter that has been used in the past to remove the foreign matter in front of the return filter It is to provide a debris removal and collection device of hydraulic oil hydraulic fluid to install a debris removal and collection device, and to selectively operate it.

Another object of the present invention is to provide a foreign matter removal and collection device of the hydraulic oil hydraulic fluid that can effectively collect the foreign matter by size according to the particle size of the foreign matter.

Still another object of the present invention is to provide a foreign material removal and collection device for hydraulic equipment operating oil capable of systematically collecting foreign materials by components by separating metal components and nonmetal components.

According to a feature of the present invention for achieving the object as described above, the present invention is provided with a strainer is installed on one side of the tank (T) to filter foreign matter of the hydraulic oil sucked into the pump (P), the tank (T) In the hydraulic circuit for the return filter is installed on the other side to filter the foreign matter of the hydraulic oil returned to the tank (T), the discharge line supplied with the hydraulic oil from the tank (T) to the pump (P), and the hydraulic oil of the discharge line The return line is returned to the tank (T) again via an actuator, and the foreign matter removal and collection device is installed on one side and branched from the return line. When the directional valve is switched, the hydraulic oil passes through the foreign matter removal and collection device. It includes a branch line that joins the return line.

And a second return line branched from the return line and having a first check valve installed at one side, and a second return line branched from the return line and provided with a second check valve installed at one side and an oil cooler installed at the other side. It is configured by.

It is further configured to further include a parallel line branched back from the branch line and joined with the return line and having a bypass check valve on one side.

The foreign material removal and collection device is a multi-stage structure that is partitioned by a plurality of filters and composed of a plurality of chambers.

The multistage structure may disassemble and reassemble the filter from the chamber.

An inlet portion communicating with one side of the branch line is formed at one side of the chamber, and an outlet portion communicating with the other side of the branch line is formed at the other side of the chamber.

The multi-stage structure has a smaller particle size of the foreign matter filtered from the inlet side to the outlet side.

The first chamber is equipped with a 50 μm filter, the second chamber is equipped with a 15 μm filter, and the third chamber is equipped with a 5 μm filter to filter the particle size of the foreign matter in multiple stages.

The lower portion of each chamber is provided with a magnetic chip detector to filter foreign matter of the metal component.

The lower plate of the chamber equipped with the chip detector is disassembled and reassembled.

It is configured to detect the rotational speed of the engine and automatically switch the directional valve in the standby state such as idle.

The bypass check valve is further provided on one side of the parallel line, so that when the pressure of the hydraulic oil passing through the branch line by the clogging of the foreign matter removal and collection device becomes higher than the set pressure, a part of the hydraulic oil is the bypass check valve. Bypass to the return line.

A display unit for informing the driver of an open / closed state of the bypass check valve may be further provided to appropriately select a time for removing the foreign matter and collecting device.

In order to appropriately select the replacement time of the foreign material removal and collection device, the sensor is provided at each of the inlet and outlet of the chamber, thereby further including a display unit for informing the driver of the pressure difference between the inlet and outlet sensors.

According to the present invention, the foreign material removal and collection device of the hydraulic machine hydraulic oil having the above configuration has the advantage of systematically filtering and effectively classifying the oil.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the foreign matter removal and collection device of the hydraulic oil hydraulic fluid according to the present invention having the configuration as described above will be described in detail.

According to the foreign material removal and collection device of the hydraulic machine hydraulic oil according to a preferred embodiment of the present invention as shown in Figure 2, the hydraulic circuit and the discharge line 110 is supplied with the hydraulic oil from the tank (T) to the pump (P) The return line 120 is returned to the tank T via various actuators (not shown), and the first check valve is branched from the return line 120. First return line 130 is installed 122, the second return line branched from the return line 120, the second check valve 132 is installed on one side and the oil cooler 134 is installed on the other side 140 and the branch line 150, which is horizontally branched from the return line 120, and the hydraulic fluid passes through when the direction change valve 142 is switched to the left in the drawing, and the bypass check valve 152 on one side. ) Is installed and branched again from the branch line 150 to the return line 120. It is configured to include a parallel line 160 to be joined.

One side of the tank (T) is provided with a strainer 170 for filtering foreign matters of the hydraulic oil sucked into the pump (P), the other side of the return filter 180 for filtering foreign matters of the hydraulic oil returned from the return line 120 ) Is installed.

According to the present invention, the branch line 150 is characterized in that the foreign material removal and collection device 200 is installed.

As shown in FIG. 3 and FIG. 4, the foreign material removing and collecting device 200 includes a plurality of chambers 220, 222, 224, and 226 partitioned by a plurality of filters 210, 212, and 214. . That is, an inlet 230 is formed at one side of the chamber 220 to communicate with one side of the branch line 150 to allow the hydraulic oil to pass through the foreign substance removal and collection device 200, and the chamber 226. On the other side of the outlet line 236 is communicated with the other side of the branch line 150 is passed through the foreign matter removal and collection device 200, the hydraulic oil can be discharged to the branch line 150.

The chambers 220, 222, 224, and 226 are divided by a plurality of filters 210, 212, and 214 to form a multi-stage structure. The filters 210, 212, and 214 are large depending on the particle size of the foreign matter. Different types and sizes may be provided to sequentially filter down to the small ones.

For example, a 50 μm filter 210 is mounted in the first chamber 220, a 15 μm filter 212 is mounted in the second chamber 222, and a 5 μm filter ( 214) can be filtered step by step according to the particle size of the foreign matter.

In addition, magnetic chip detectors 240, 242, 244, and 246 are installed at the lower portions of the chambers 220, 222, 224, and 226 to filter foreign substances of metal components.

In the embodiment of the present invention, the chambers 220, 222, 224, and 226 have a rectangular parallelepiped shape, but each of the filters 210, 212, and 214 and the chip detectors 240, 242, 244, and 246 are connected to the chamber. Any structure that can be disassembled and reassembled from (220, 222, 224, 226), whether circular or polygonal, is not limited in shape. That is, the filter 210 and the chip detector 240 may be exchanged by attaching and detaching the lower cover 202 of the foreign matter removing and collecting device 200.

As described above, the foreign material removing and collecting device 200 includes filters 210, 212 and 214 having a multi-stage structure and chip detectors 240, 242, 244 and 246 having a dual structure to separate and collect foreign materials by size. And, by the chip detector 240 it is possible to collect by dividing by component, such as foreign matter of metal or non-metallic component. In other words, the foreign material removal and collection device 200 is divided into a filtering by the filter 210 and the filtering by the chip detector 240, the foreign matter collection by the filtering by forming the filter 210 in a multi-stage The particle size can be classified by size, and by collecting foreign substances by size or by component, it is possible to systematically analyze and monitor the working oil.

On the other hand, the switching timing of the direction switching valve 142 is preferably determined in the standby state, not in the working state, the driver may be manually turned on (on / off), but by detecting the engine speed of the idle ( By automatically switching the direction switching valve 142 in the standby state, such as idling), the operating oil of the return circuit 120 can be configured to pass through the foreign matter removal and collection device 200 of the branch line 150.

According to another embodiment of the present invention, the bypass check valve 152 is further provided on one side of the parallel line 160 branched again from the branch line 150 to protect the hydraulic circuit.

That is, when clogging occurs because a large amount of sludge or foreign matter accumulates in the foreign material removal and collection device 200, the flow of the working oil is impeded. At this time, when the pressure of the hydraulic oil passing through the branch line 150 is more than the set pressure it is possible to protect the hydraulic circuit by bypassing a part of the hydraulic oil through the bypass check valve 152.

Accordingly, the display unit may further include a display unit (not shown) capable of displaying the open / closed state of the bypass check valve 152 through various signals such as light, sound, letters, symbols, and the like. In this way, the driver may recognize the opening / closing state of the bypass check valve 152 to determine the time to replace the foreign matter removal and collection device 200.

In addition, by installing a sensor in the inlet 230 of the chamber 220 and the outlet 236 of the chamber 226 so as to know the replacement time of the foreign material removal and collection device 200, the inlet The pressure difference between the sensor 230 and the outlet 236 may be displayed on the display unit.

As described above, the present invention further installs a branch line in the return line, the hydraulic fluid passes through any one of the return line and the branch line as the direction switching valve is switched in the standby state, to remove foreign substances in the branch line And a collecting device, and the foreign material removing and collecting device is composed of a multi-stage structure divided into a plurality of chambers according to the size of the particle size and a multi-structure separated into a filter and a chip detector according to the nature of the particle size. It can be seen that. Within the scope of the basic technical idea of the present invention, many other modifications will be possible to those skilled in the art. For example, such a foreign material removal and collection device may be applied to construction machinery such as excavators or loaders, as well as industrial machinery such as presses and lathes, or steering devices of vehicles.

As described above, according to the configuration of the present invention, the following effects are expected.

First, it is possible to use a foreign material removal and collection device such as a strainer and a return filter used in the prior art, and it is economical to add a foreign material removal and collection device to the existing hydraulic circuit configuration.

Second, since the driver can manually change the direction switching valve to control the removal and collection of debris, it is operated by a conventional hydraulic circuit before operation, and if necessary, the driver passes through the debris removal and collection device via a branch line. This is very convenient because it can be selected and it can be operated especially in standby.

Third, it is possible to collect the foreign substances in stages according to the particle size of foreign matters effectively so that the foreign substances can be effectively collected and analyzed so that the management of hydraulic equipment can be more scientifically realized.

Fourth, it is possible to collect the foreign substances by metal and non-metallic components for each component of the foreign material to collect the foreign material structurally and to monitor this, it is possible to systematically manage the operating oil.

Claims (14)

One side of the tank (T) is provided with a strainer to filter foreign matters of the hydraulic oil sucked into the pump (P), the other side of the tank (T) is provided with a return filter to filter the foreign matters of the hydraulic oil returned to the tank (T) In the hydraulic circuit, A discharge line through which hydraulic oil is supplied from the tank T to the pump P, A return line for returning the working oil of the discharge line back to the tank T via various actuators; The hydraulic branch comprising a branching line branched from the return line and the foreign matter removal and collection device is installed on one side and the directional valve is switched to pass through the foreign matter removal and collection device to join the return line. Device for removing and collecting foreign matter from the machine's hydraulic fluid. The method of claim 1, A first return line branched from the return line and having a first check valve installed at one side thereof; And a second return line branched from the return line and having a second check valve installed at one side and an oil cooler installed at the other side. The method of claim 2, The foreign matter removal and collection device of the hydraulic oil hydraulic fluid, characterized in that further comprises a parallel line branched again from the branch line and the return line and having a bypass check valve on one side. The method of claim 1, The foreign material removal and collection device, foreign matter removal and collection device of the hydraulic oil hydraulic fluid, characterized in that the multi-stage structure consisting of a plurality of chambers partitioned by a plurality of filters. The method of claim 4, wherein And said multi-stage structure disassembles and reassembles said filter from said chamber. The method of claim 5, One side of the chamber is formed with an inlet portion communicating with one side of the branch line, the other side of the chamber is formed with an outlet portion in communication with the other side of the branch line is foreign material removal and collection device of the hydraulic oil. The method of claim 6, The multi-stage structure is foreign matter removal and collection device of the hydraulic oil hydraulic fluid, characterized in that the particle size of the foreign matter filtered from the inlet side toward the outlet side is gradually smaller. The method of claim 7, wherein Hydraulic apparatus characterized in that the filter equipped with a filter of 50㎛ in the first chamber, 15㎛ filter in the second chamber, 5㎛ filter in the third chamber to filter the particle size of the foreign matter in multiple stages Device for removing and collecting foreign matter from working oil. The method of claim 4, wherein The lower portion of each chamber is provided with a magnetic chip detector to remove foreign substances and collecting device of the hydraulic oil, characterized in that to filter foreign matter of the metallic component. The method of claim 9, The foreign material removal and collection device of the hydraulic oil of the hydraulic device, characterized in that disassembling and reassembling the lower plate of the chamber equipped with the chip detector. The method of claim 1, The foreign material removal and collection device of the hydraulic oil of the hydraulic equipment, characterized in that configured to automatically switch the direction switching valve in the standby state, such as idle by sensing the engine speed. The method of claim 3, wherein The bypass check valve is further provided on one side of the parallel line, so that when the pressure of the hydraulic oil passing through the branch line by the clogging of the foreign matter removal and collection device becomes higher than the set pressure, a part of the hydraulic oil is the bypass check valve. Foreign material removal and collection device of the hydraulic oil, characterized in that the bypass to the return line through. The method of claim 12, And a display unit for informing the driver of the open / closed state of the bypass check valve so as to appropriately select a replacement time of the foreign material removal and collection device. The method of claim 6, In order to appropriately select the time to remove the foreign matter and the collection device, the sensor is installed at each of the inlet and outlet of the chamber, further comprising a display unit for notifying the driver of the pressure difference between the inlet and outlet sensors. Debris removal and collection device for hydraulic oil.

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